Housing structure for lighting equipment and process for producing the same, and backlight device using said structure

Abstract

The present invention provides a housing structure for a lighting device, including a molded product having a thickness of 1.5 to 3.5 mm produced from a polycarbonate-based resin composition containing 20 to 60% by mass of titanium oxide, and a method of producing a housing structure for a lighting device, including: subjecting a polycarbonate-based resin composition containing 20 to 60% by mass of titanium oxide into a sheet; and subjecting the sheet to vacuum forming or pressing to produce a box-type molded product in which a fixing portion of a terminal of a light source is molded integrally to an inner side portion of the molded product. Also provided are a housing structure for a lighting device, which is lightweight and requires small man-hour for assembling, a method of manufacturing the same, a backlight device using the housing for a lighting device, and a liquid crystal display member.

1. A housing structure for a lighting device, comprising a box-like molded product having a thickness of 1.5 to 3.5 mm obtained from a polycarbonate-based resin composition containing 20 to 60% by mass of titanium oxide, wherein an inner side portion of the molded product has a fixing portion of a terminal of light source integrally formed thereon. 
     
     
       2. A housing structure for a lighting device according to  claim 1 , further comprising light source support portion integrally formed on an inner bottom portion of the molded product. 
     
     
       3. A housing structure for a lighting device according to  claim 1 , further comprising a rib structure on an upper portion of the box-like molded product. 
     
     
       4. A housing structure for a lighting device according to  claim 1 , further comprising a rib structure or a projection portion according to optical design on a bottom portion of the box-like molded product. 
     
     
       5. A housing structure for a lighting device according to  claim 1 , further comprising a light diffusing plate support portion formed integrally on an inner bottom portion of the molded product. 
     
     
       6. A housing structure for a lighting device according to  claim 5 , wherein the light diffusing plate support portion integrally formed on the inner bottom portion of the molded product is formed on a fluorescent tube support portion or a projection portion according to optical design formed on the bottom portion. 
     
     
       7. A housing structure for a lighting device according to  claim 1 , further comprising a light shielding layer on an exterior surface of the box-like molded product. 
     
     
       8. A housing structure for a lighting device according to  claim 1 , further comprising a light resistant coating layer on an interior surface of the box-like molded product. 
     
     
       9. A housing structure for a lighting device according to  claim 1 , further comprising a light reflection film bonded to the interior surface of the box-like molded product. 
     
     
       10. A housing structure for a lighting device according to  claim 1 , wherein an inner bottom portion of the box-like molded product has a reflectance (Y value) for reflected light of 95% or higher and a total light transmittance of 1% or lower. 
     
     
       11. A housing structure for a lighting device according to  claim 1 , further comprising a tap hole for attaching other parts formed in a rear surface or front surface of the housing. 
     
     
       12. A housing structure for a lighting device according to  claim 1 , further comprising a recessed storage portion for storing a drive substrate integrally formed in any one of box-like upper end portions. 
     
     
       13. A backlight device manufactured by incorporating a linear or point light source in the housing structure for the lighting device according to  claim 1 , placing a light diffusing plate above the light source, and further laminating optical films. 
     
     
       14. A liquid crystal display member, which is manufactured by: incorporating the linear or point light source in the housing structure for the lighting device according to  claim 1 ; placing a light diffusing plate, an optical film, and a liquid crystal panel above the linear or point light source in that stated order; and attaching a peripheral frame member to a periphery thereof. 
     
     
       15. A liquid crystal display member according to  claim 14 , further comprising a reinforcing frame attached to the peripheral frame member on a backside of the liquid crystal display member. 
     
     
       16. A liquid crystal display member, wherein the liquid crystal display member according to  claim 15  has the peripheral frame member and/or the reinforcing frame made of a metal. 
     
     
       17. A method of manufacturing a housing structure for a lighting device, comprising the steps of:
 forming a polycarbonate-based resin composition containing 20 to 60% by mass of titanium oxide into a sheet; and 
 vacuum forming or pressing the sheet to manufacture a box-like molded product having a thickness of 1.5 to 3.5 mm in which a portion for fixing a terminal of a light source is integrally formed on an inner side portion.